128465713531 has 2 divisors, whose sum is σ = 128465713532. Its totient is φ = 128465713530.

The previous prime is 128465713501. The next prime is 128465713603. The reversal of 128465713531 is 135317564821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128465713531 - 2⁵ = 128465713499 is a prime.

It is a super-2 number, since 2×128465713531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128465713501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64232856765 + 64232856766.

It is an arithmetic number, because the mean of its divisors is an integer number (64232856766).

Almost surely, 2^128465713531 is an apocalyptic number.

128465713531 is a deficient number, since it is larger than the sum of its proper divisors (1).

128465713531 is an equidigital number, since it uses as much as digits as its factorization.

128465713531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 46.

The spelling of 128465713531 in words is "one hundred twenty-eight billion, four hundred sixty-five million, seven hundred thirteen thousand, five hundred thirty-one".